/*
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 * and open the template in the editor.
 */
package com.sjtu.servlet;

import com.sjtu.bean.CategoryBean;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONException;
import org.json.JSONObject;

/**
 *
 * @author p w
 */
public class SubCategoryServlet extends HttpServlet {

    @Override
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        this.doWork(request, response);
    }

    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        this.doWork(request, response);
    }

    public void doWork(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//        System.out.println("SubCategoryServlet work");
        String obj = request.getParameter("obj");
        JSONObject jsonObj = null;
        try {
            jsonObj = new JSONObject(obj);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        PrintWriter writer = response.getWriter();
        try {
            String fatherString = jsonObj.getString("fatherCategory");
            if (fatherString.equals("Category")) {
                fatherString = "";
            }
            ArrayList<String> subcates = CategoryBean.subcategory(fatherString);
            JSONObject jsonRes = new JSONObject();
            jsonRes.put("subcates", subcates);
            writer.write(jsonRes.toString());
//            System.out.println(jsonRes.toString());
        } catch (JSONException e) {
            e.printStackTrace();
        }
        writer.flush();
        writer.close();
    }
}
